omnibus perldelta updates for commits cherry-picked to maint

1 files changed, 28 insertions, 294 deletions

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index e0d91295c3..d58f50bb04 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,9 +2,6 @@
 
 =head1 NAME
 
-[ this is a template for a new perldelta file. Any text flagged as
-XXX needs to be processed before release. ]
-
 perldelta - what is new for perl v5.16.1
 
 =head1 DESCRIPTION
@@ -12,288 +9,42 @@ perldelta - what is new for perl v5.16.1
 This document describes differences between the 5.16.0 release and
 the 5.16.1 release.
 
-If you are upgrading from an earlier release such as 5.16.0, first read
+If you are upgrading from an earlier release such as 5.14.0, first read
 L<perl5160delta>, which describes differences between 5.16.0 and
 5.16.0.
 
-=head1 Notice
-
-XXX Any important notices here
-
-=head1 Core Enhancements
-
-XXX New core language features go here. Summarise user-visible core language
-enhancements. Particularly prominent performance optimisations could go
-here, but most should go in the L</Performance Enhancements> section.
-
-[ List each enhancement as a =head2 entry ]
-
 =head1 Security
 
-XXX Any security-related notices go here.  In particular, any security
-vulnerabilities closed should be noted here rather than in the
-L</Selected Bug Fixes> section.
+=head2 an off-by-two error in Scalar-List-Util has been fixed
 
-[ List each security issue as a =head2 entry ]
+The bugfix was in Scalar-List-Util 1.23_04, and perl 5.16.1 includes
+Scalar-List-Util 1.25.
 
 =head1 Incompatible Changes
 
-XXX For a release on a stable branch, this section aspires to be:
-
-    There are no changes intentionally incompatible with 5.XXX.XXX
-    If any exist, they are bugs, and we request that you submit a
-    report.  See L</Reporting Bugs> below.
-
-[ List each incompatible change as a =head2 entry ]
-
-=head1 Deprecations
-
-XXX Any deprecated features, syntax, modules etc. should be listed here.
-In particular, deprecated modules should be listed here even if they are
-listed as an updated module in the L</Modules and Pragmata> section.
-
-[ List each deprecation as a =head2 entry ]
-
-=head1 Performance Enhancements
-
-XXX Changes which enhance performance without changing behaviour go here. There
-may well be none in a stable release.
-
-[ List each enhancement as a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
-
-=back
+There are no changes intentionally incompatible with 5.16.0 If any
+exist, they are bugs, and we request that you submit a report.  See
+L</Reporting Bugs> below.
 
 =head1 Modules and Pragmata
 
-XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
-go here.  If Module::CoreList is updated, generate an initial draft of the
-following sections using F<Porting/corelist-perldelta.pl>, which prints stub
-entries to STDOUT.  Results can be pasted in place of the '=head2' entries
-below.  A paragraph summary for important changes should then be added by hand.
-In an ideal world, dual-life modules would have a F<Changes> file that could be
-cribbed.
-
-[ Within each section, list entries as a =item entry ]
-
-=head2 New Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
 =head2 Updated Modules and Pragmata
 
 =over 4
 
 =item *
 
-L<XXX> has been upgraded from version 0.69 to version 0.70.
-
-=back
-
-=head2 Removed Modules and Pragmata
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Documentation
-
-XXX Changes to files in F<pod/> go here.  Consider grouping entries by
-file and be sure to link to the appropriate page, e.g. L<perlfunc>.
-
-=head2 New Documentation
-
-XXX Changes which create B<new> files in F<pod/> go here.
-
-=head3 L<XXX>
-
-XXX Description of the purpose of the new file here
-
-=head2 Changes to Existing Documentation
-
-XXX Changes which significantly change existing files in F<pod/> go here.
-However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
-section.
-
-=head3 L<XXX>
-
-=over 4
-
-=item *
-
-XXX Description of the change here
-
-=back
-
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages.  For the complete list of
-diagnostic messages, see L<perldiag>.
-
-XXX New or changed warnings emitted by the core's C<C> code go here. Also
-include any changes in L<perldiag> that reconcile it to the C<C> code.
-
-[ Within each section, list entries as a =item entry that links to perldiag,
-  e.g.
-
-  =item *
-
-  L<Invalid version object|perldiag/"Invalid version object">
-]
-
-=head2 New Diagnostics
-
-XXX Newly added diagnostic messages go here
-
-=head3 New Errors
-
-=over 4
-
-=item *
-
-XXX L<message|perldiag/"message">
-
-=back
-
-=head3 New Warnings
-
-=over 4
-
-=item *
-
-XXX L<message|perldiag/"message">
-
-=back
-
-=head2 Changes to Existing Diagnostics
-
-XXX Changes (i.e. rewording) of diagnostic messages go here
-
-=over 4
-
-=item *
-
-XXX Describe change here
-
-=back
-
-=head1 Utility Changes
-
-XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go
-here. Most of these are built within the directories F<utils> and F<x2p>.
-
-[ List utility changes as a =head3 entry for each utility and =item
-entries for each change
-Use L<XXX> with program names to get proper documentation linking. ]
-
-=head3 L<XXX>
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Configuration and Compilation
-
-XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
-go here.  Any other changes to the Perl build process should be listed here.
-However, any platform-specific changes should be listed in the
-L</Platform Support> section, instead.
-
-[ List changes as a =item entry ].
-
-=over 4
-
-=item *
-
-XXX
-
-=back
-
-=head1 Testing
-
-XXX Any significant changes to the testing of a freshly built perl should be
-listed here.  Changes which create B<new> files in F<t/> go here as do any
-large changes to the testing harness (e.g. when parallel testing was added).
-Changes to existing files in F<t/> aren't worth summarising, although the bugs
-that they represent may be covered elsewhere.
-
-[ List each test improvement as a =item entry ]
-
-=over 4
-
-=item *
-
-XXX
+L<Scalar::Util> and L<List::Util> have been upgraded from version 1.23 to
+version 1.25.
 
 =back
 
 =head1 Platform Support
 
-XXX Any changes to platform support should be listed in the sections below.
-
-[ Within the sections, list each platform as a =item entry with specific
-changes as paragraphs below it. ]
-
-=head2 New Platforms
-
-XXX List any platforms that this version of perl compiles on, that previous
-versions did not. These will either be enabled by new files in the F<hints/>
-directories, or new subdirectories and F<README> files at the top level of the
-source tree.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
-=head2 Discontinued Platforms
-
-XXX List any platforms that this version of perl no longer compiles on.
-
-=over 4
-
-=item XXX-some-platform
-
-XXX
-
-=back
-
 =head2 Platform-Specific Notes
 
-XXX List any changes for specific platforms. This could include configuration
-and compilation changes or changes in portability/compatibility.  However,
-changes within modules for platforms should generally be listed in the
-L</Modules and Pragmata> section.
-
 =over 4
 
-=item XXX-some-platform
-
-XXX
-
 =item VMS
 
 All C header files from the top-level directory of the distribution are now
@@ -303,35 +54,33 @@ builds for extensions that depended on the missing include files.
 
 =back
 
-=head1 Internal Changes
-
-XXX Changes which affect the interface available to C<XS> code go here.
-Other significant internal changes for future core maintainers should
-be noted as well.
-
-[ List each change as a =item entry ]
+=head1 Selected Bug Fixes
 
 =over 4
 
 =item *
 
-XXX
-
-=back
+A regression introduced in Perl v5.16.0 involving
+C<tr/I<SEARCHLIST>/I<REPLACEMENTLIST>/> has been fixed.  Only the first
+instance is supposed to be meaningful if a character appears more than
+once in C<I<SEARCHLIST>>.  Under some circumstances, the final instance
+was overriding all earlier ones.  [perl #113584]
 
-=head1 Selected Bug Fixes
+=item *
 
-XXX Important bug fixes in the core language are summarised here.
-Bug fixes in files in F<ext/> and F<lib/> are best summarised in
-L</Modules and Pragmata>.
+B::COP::stashflags, accidentally broken at the last minute in 5.16.0,
+has been restored to working order.
 
-[ List each fix as a =item entry ]
+=item *
 
-=over 4
+The L<re> pragma will no longer clobber C<$_>. [perl #113750]
 
 =item *
 
-XXX
+Unicode 6.1 published an incorrect alias for one of the
+Canonical_Combining_Class property's values (which range between 0 and
+254).  The alias C<CCC133> should have been C<CCC132>.  Perl now
+overrides the data file furnished by Unicode to give the correct value.
 
 =item *
 
@@ -341,31 +90,16 @@ instance is supposed to be meaningful if a character appears more than
 once in C<I<SEARCHLIST>>.  Under some circumstances, the final instance
 was overriding all earlier ones.  [perl #113584]
 
-=back
-
-=head1 Known Problems
-
-XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any
-tests that had to be C<TODO>ed for the release would be noted here, unless
-they were specific to a particular platform (see below).
-
-This is a list of some significant unfixed bugs, which are regressions
-from either 5.XXX.XXX or 5.XXX.XXX.
-
-[ List each fix as a =item entry ]
-
-=over 4
-
 =item *
 
-XXX
+Duplicating scalar filehandles works again.  [perl #113764]
 
 =back
 
-=head1 Obituary
+=head1 Known Problems
 
-XXX If any significant core contributor has died, we've added a short obituary
-here.
+There are no new known problems, but consult L<perl5160delta/Known
+Problems> to see those identified in the 5.16.0 release.
 
 =head1 Acknowledgements